Packing.



Patented Mar. l3, I900. H. soenuus.

PACKING.

(Application filed Nov. 14, 1899.)

(ms may.

A TTOHN E Y M W f 4 a m 6 m H .9 W J a L fl F fl =ifl 1 a w m m 4 1 9 E W 5 w 1 ay UNITED STATES PATENT OFFicE.

HENRY BOEI-ILING, OF PHILADELPHIA, PENNSYLVANIA.

PACKING.

SPECIFICATION forming part of Letters Patent No. 645,224, dated March 13, 1906. Application filed November 14,1899. $erial No. 7363925. (N model.)

To all whom it may concern.-

Be it known that I,HENRY BOEHLING a resident of the city of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Packing, of which the following is a specification.

My invention relates to packing for pistonrods and is particularly designed for ammonia packing, as in ice-machines. Its primary objects are to provide a more efiective packing than has heretofore been employed and to permit the expansion and return of gas escaping from the compressor.

In the accompanying drawings, illustrating my invention, Figure 1 is a longitudinal sectional view of my packing in its relation to a piston-rod. Fig. 2 is a transverse sectional view on the line a a of Fig. 1, and Fig. 3is a perspective view of the sectional packing-rim g.

In the drawings the followers, as 1, 2, and 3, through which the piston-rod 4 reciprocates, may be held to the compressor-head 5 by the bolts 6. Each of the follower-s1 and 2 is provided with a groove 7, which-receives the ring 8 of the proximate follower, a soft-metal packing-ring 9 being placed in each groove 7 as a seat for each ring 8. Each of the followers 1 and 2 is provided with a ring 10, which fits within the cylindrical channel 11 ofthe proximate follower. A soft-metal ring 12 is seated at the end of each of the cylindrical channels 11. V

A sectional packing-ring 13 lies in each of the channels 11 between the corresponding rings and 12: The rings 13 are formed, preferably, in three sections jointed by double lap-joints, each section having a lap 14. and a lap 15, joining ona surface 16, and also a lap 14 and a lap 15', joining on a surface 17. The sections of the rings are held together on the surfaces 17 and against the piston-rod 4 by plungers 18, sufficient play between the ends of the sections being provided to permit the requisite contraction. The plungers are pressed inward by the coiled springs 19, seated against the plugs 20, which close the recesses 21, within which the springs and plungers operate. Plungers 22 hold the sections together on the surfaces 16 and against the rings 12, a stud 23 on each section playing within a recess 21 in each plunger to permit the sections to contract and expand independ entlyof these plungers. The plungers 22 are pressed outward by the coiled springs -25,bear ing against the ends of the recesses 26, within which the springs and plungers operate.

A valve 27, located in the recess 28 and controlled by a coiled spring 29, normally closes a port 30, which leads from the channel 11, between the followers 2 and 3, through the passage 31, to the channel 11, between the followers 1 and 2. The valveis provided with a stem 32, suitably triangularin section,which plays within the cylindrical opening or port 30 to guide the valve. The port 30 is located in a screw-plug 33, set in the follower 2.

The rings 12 are formed, preferably, of an alloy of tin and lead. The sectional rings 13 are preferably formed of a shell 13 of hard metal, as steel, and a bodylS of soft metal, consisting of an alloy of lead and tin. The hard shell and the soft body are so arranged that each frictional area involves the impact of hard metal and soft metal. This is effected by forming the periphery, the two parallel faces, the bearing-surface 16 of the lap '14, and the bearing-surface 17 of the lap 1i of-steel, while the soft-metal body is exposed at'the interior surface of the sectional ring on the bearing-surface 16 of the lap 15 15 and the bearing-surface 17 of the lap 15.

In the operation when the piston-rod travelsin the direction of the arrow gas that may escape from the compressor and follow the rod will be checked by the first sectional packing-ring having its soft-metal interior in close bearing-contact with the piston-rod and its hard-metal shellin close contact with .the proximate soft-metal ring, every joint being held closed by pressure, as explained. Any gas that may pass the first sectional ring is checked by thesecond sectional ring and by its pressure lifts the valve and passes from the channel occupied by the second ring back to the channel occupied by the first ring through the connecting-passages. The back stroke of the piston carries gas in the channels occupied by the rings back to the compressor.

Having described myinvention, I claim 1. In a packing, a ring divided into'sections connected by double lap-joints having bearing-surfaces substantially at right angles to each other, each section having an outer lap and an inner lap, in combination with plungers acting substantially at right angles to each other for pressing said sections together on said bearing-surfaces, as specified.

2. In a packing, in. combination with a piston-rod, a follower, a ring divided into sections connected by double lap-joints having a bearing-surface transverse to said pistonrod, and a bearing-surface parallel thereto, each of said sections having an outer lap and an inner lap, plungers for pressing said sections against said piston-rod and together on said bearing-surfaces parallel thereto, and plnngers for pressing said sections against said follower and together on said transverse bearing-surfaces.

3. Ina packing, in combination witha piston-rod, afollower, a soft-metal ring seated in said follower, a ring divided into sections connected by double lap-joints having a bearin g-snrface transverse to said piston-rod, and a bearing-surface parallel thereto, plungers for pressing said sections against said pistonrod and together on said surfaces parallel thereto, and plungers for pressing said sectionsagainst said softmetal ring and together on said transverse bearing-surfaces.

4. In a packing, in combination with a piston-rod and a follower, a channel at the joint of said follower, a valve opened by fluid-pressure and automatically closing communicating with said channel, and a passage leading from said valve, substantially as specified.

5. In a packing, a follower, a second follower joined thereto, a channel between said followers, a valve located in said second follower, and communicating with said channel,

and a passage leading from said valve, substantially as specified.

6. In a packing, in combination with a piston-rod, a follower, a second follower joined thereto, a channel'between said followers, a valve in said second follower communicating with said channel, a passage leading from said valve, and a second channel communieating with said passage, substantially as specified.

7. In a packing, in combination with a piston-rod, a follower, a second follower joined thereto, a channel between said followers in communication with said piston-rod, a passage throngh said second follower, a valveport connecting said channel and passage, and a spring-controlled valve having a stem which reciprocates in said port.

8. In a packing, in combination with a piston-rod, a follower, a second follower joined thereto, a channel between said followers in communication with said piston-rod, a sectional packing-ring in said channel, a passage through said second follower, a valveport connecting said channel and passage, a

valve for controlling said port, a secondchannel in communication with said passage and said piston-rod, and a sectional packing-ring in said secondchannel, substantially asspecfied.

9. In a packing, in combination with a piston-rod, a follower, a second follower joined thereto, a channel between said followers in communication with said piston-rod, a sectional packing-ring in said channel, a third follower joined to said second follower, a channel between said second and third followers, a sectional packing-ring in said second channel, a passage connecting said channels, and a valve for controlling said passage, substantially as specified.

10. A sectional packing-ring consisting of a hard-metal shell and a soft-metal body, said sections being connected by double lap-joints, the frictional contact between the joints of the sections involving the bearing of a hardmetal surface'on a soft-metal surface, substantially as specified.

In witness whereof I have hereunto signed my name, this 10th day of November, A. D. 1899, in the presence of the subscribing witnesses.

HENRY BOEHLING.

\Vitnesses:

JNo. SToKEs ADAMS, C. N. BUTLER. 

